JUST STAY AWAY

I have an account with Incredible Connection. This month they debit me for the incorrect amount. my account is debited on the last day of the month. I leave money in my account for this amount to go off, I wait 10 days and nothing happens, no phone call, no email, no SMS, absolutely nothing. On the 10th on November they decide to SMS and tell me they're debiting my account on the 10th, the very same day. So I email the email address for account as stated on my statement. They respond by telling me that they're customer care and I must phone the number provided. I refuse to buy airtime as that just disappears so I ask them to please forward my email to the relevant person as I do not have money for this debit order and they cannot tell me on the day. Fair enough a lady calls me. This lady calls me to question why I didn't call them when I noticed the amount was incorrect. Excuse me?? This is not my mistake, i waited days for them to contact me about this and then the email for accounts on my statement is apparently customer care so?? so after the terrible phone call, we come to an agreement to debit my account at the end of the month. they send me an updated debit order mandate to accept the amount and date and they send me an updated statement. will they not debit my account today, the 15th of November!!! so tell me now, do i now have to fight again to not debit that amount at the end of the month?? the incompetency and service is infuriating!! i have no idea what to do because as much as i fight they will still debit the incorrect amount and blame the customer for their mistake. JUST STAY AWAY.